LS ch 12 vocab

Front

Fluid-filled cavity surrounded by muscle tissue.

Back

hydrostatic skeleton

Front

Netlike control system sending signals throughout the body.

Back

nerve net

Front

Some animals move in a wave-like motion called ____________

Back

undulation

Front

Movement of substances from high to low concentration.

Back

diffusion

Front

Tiny holes on an organism's surface for oxygen intake and carbon dioxide release.

Back

spiracles

Front

Organs for oxygen intake and carbon dioxide release: __________

Back

gills

Front

System that transports blood and fluids in open spaces around organs.

Back

open circulatory system

Front

System that transports materials via blood vessels.

Back

Closed circulatory system

Front

Specialized structure in the digestive system for storing ingested material.

Back

crop

Front

Muscular pouch that grinds food.

Back

gizzard